Charles Alexander, MD, Endocrinology, Gwynedd Valley, PA


Endocrinology Gwynedd Valley, PA


Managing Director, Alexander Associates LLC

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  • Charles M. Alexander, M.D., F.A.C.P., F.A.C.E. is an endocrinologist who has more than 35 years of experience in diabetes, both direct patient care and research. Since 2016, he has provided consulting services to pharmaceutical, medical device companies, etc. Dr. Alexander retired from Merck in 2015 after 23 years in both Outcomes Research and Medical Affairs. Roles at Merck included Global Medical Director for Diabetes in Medical Affairs 2008-2015 and Senior Director Outcomes Research from 1996-2008 and Director in Medical Affairs 1992-1996. He worked in many therapeutic areas in Outcomes Research in addition to diabetes including cholesterol, atherosclerosis, hypertension, and osteoporosis. Prior to joining Merck, he practiced diabetes, endocrinology and internal medicine in Los Angeles for ten years and was Clinical Professor of Medicine at the Keck School of Medicine of the University of Southern California (KSOM/USC). Dr. Alexander has been a member of Penn Medicine’s Institute for Diabetes, Obesity and Metabolism (IDOM) Leadership Council since 2016 and a volunteer for the diaTribe Foundation since 2016. He is a Past President of the Academy of Pharmaceutical Physicians and Investigators (APPI). In addition, he also served as a volunteer consultant in diabetes and endocrinology at the HealthLink Medical Clinic, Southampton, Pennsylvania from 2010-2015. He was a member of the board of directors of the Eastern Pennsylvania & Delaware Chapter of the American Diabetes Association 2012-2018. Dr. Alexander received his medical degree from KSOM/USC where he also did his postgraduate training in internal medicine and diabetes/endocrinology. Dr. Alexander is board certified in Internal Medicine and Endocrinology-Metabolism and is a Fellow of both the American College of Physicians and the American College of Endocrinology. He is the author of numerous scientific articles and a frequent reviewer for medical journals.

Education & Training

  • Keck School of Medicine of USC
    Keck School of Medicine of USCClass of 1977

Certifications & Licensure

  • PA State Medical License
    PA State Medical License 1994 - 2016
  • CA State Medical License
    CA State Medical License 1978 - 2020
  • American Board of Internal Medicine Internal Medicine
  • American Board of Internal Medicine Endocrinology, Diabetes and Metabolism

Awards, Honors, & Recognition

  • Fellow American College of Physicians
  • Fellow (FACE) American Association of Clinical Endocrinology

Publications & Presentations


Professional Memberships